Lee Keel

Professor

Lee Keel is currently a Professor in the Department of Electrical and Computer Engineering at Tennessee State University. He received his Ph.D. degree in Electrical Engineering from Teax A&M University, College Station, Texas in 1986. His area of competency includes linear systems, robust control, and networked control systems. In recent year, he is conducting research in developing techniques for data-based control design. Throughout his academic career, his research has been continuously supported by funding from NSF, NASA-Ames, NASA-LaRC, NASA-GSFC, NASA-MSFC, and DoD He has authored and coauthored over 150 technical refereed journal and conference publications and three text books. 
 

EDUCATION
 EXPERIENCE
 RESEARCH
 PUBLICATIONS
 GUIDED THESES AND DISSERTATION
 AWARDS/FELLOWSHIPS/SCHOLARSHIPS/SERVICES

  Keel

Office: 247 Research & Sponsored Programs Building
Phone: 615-277-1611 
Email:lkeel@tnstate.edu

EDUCATION
 Ph.D., Electrical Engineering, Texas A&M University, College Station, Texas, 1986
M.S., Electrical Engineering, Texas A&M University, College Station, Texas, 1982
B.S., Electronics Engineering, Korea University, Seoul, Korea, 1978.

EXPERIENCE
Professor: (1986–Present), Department of Electrical and Computer Engineering and also with Center of
                  Excellence in Information Systems, Tennessee State University, Nashville, Tennessee.
Adjunct Professor: (1991 – Present), Department of Mechanical Engineering, Vanderbilt University,
Director: (1997–2007), Center for Systems Science Research, Tennessee State University.
Research & Teaching Assistant: (1981–1986) Department of Electrical Engineering, Texas A&M.
NASA/ASEE: (2003, 2004), Summer Faculty Fellow, NASA Marshall Space Flight Center, Huntsville, AL.
Engineer: (1978 – 1980), LG Telecommunications R&D, Seoul, Korea.

RESEARCH
Professional interests: Linear Systems Theory, Cyber Physical Systems, Computer Aided Control Systems Design, Robust Control, Controls and Structures, Networked Control Systems

Research grant awards:

  • Center for Texas A&M Teaching Excellence, "Development of interactive program - package for control system analysis and design," $1,000, summer 1985 (PI).
  • NASA Langley Research Center, "Robust control with structured perturbations", NAG-1-863,
  • $190,000 1988 – 1992 (PI).
  • National Science Foundation, "International Workshop on Robust Control at San Antonio, Texas," $39,000, 1991 (PI).
  • National Science Foundation, (supplementary fund) "International Workshop on Robust Control at Ascona, Switzerland," $8,000, 1992 (Co-PI).
  • NASA Goddard Space Flight Center, "Parametric Robust Control and System Identification: Unified Approach," NAG 5-2109, $270,000, 1992 – 1995 (PI).
  • National Science Foundation, "Parametric Robust Control Design," HRD-9252932, $350,000, 1992 – 1996 (PI).
  • NASA Ames Research Center, "The Associate Principal Astronomer for AI Management of Automatic Telescopes," NCC2-997, $120,000. 1997 – 1998 (Co-PI).
  • NASA Headquarters, "Center for Automated Space Sciences," NCC-0085, $6,500,000, 1995
  • – 2000 (Co-PI).
  • National Science Foundation, "Center for Systems Science Research," HRD-9706268,
  • $4,500,000, 1997 – 2002 (PI).
  • NASA Headquarters, "Center for Automated Space Sciences," NCC-0085, $5,000,000, 2000
  • – 2005 (Co-PI).
  • Army Research Office, "Stochastic Control Problems and Applications," 42492-MA-ISP,
  • $250,000, 2001 – 2005 (PI).
  • National Science Foundation, "Center for Systems Science Research," HRD-0206028,
  • $4,500,000, 2002 – 2007 (PI).
  • NASA Marshall Space Flight Center, "Active & Passive Damping Approaches for Solar Sail Spacecraft," NNM05AA13G, $145,000, 01/2005 - 12/2007 (PI).
  • National Science Foundation, "Control of Networked Multi-Agent Decision Systems," HRD- 0531490, $999,205, 10/2005 - 09/2011 (PI).
  • US Army Research Office, "Measurement Based, Model Free Fixed Order Control Synthesis for Multiple Performance Criteria," W911NF-08-0514, $740,525, 10/2008 - 03/2013 (PI).
  • National Science Foundation, "Multivariable Fixed Order Controller Synthesis and Design from Data," CMMI-0927652, $149,238, 10/2009 - 9/2013 (PI).
  • Boeing Company, "Development of an Agile and Resilient Security Architecture to Protect Embedded Systems from Emerging Cyber Threats," $150,000 10/2013 – 9/2014 (Co-PI).
  • US Army Research Office, "A New Protocol for Distributed Control of Wireless Control Network via Cloud Computing," W911NF-13-1-0144, $628,556 5/2013 - 4/2016 (PI).
  • Naval Surface Weapon Center, "Defense and Countermeasures of Jamming Attacks in Wireless Mesh Networks," N00174-15-0001, $450,000 3/1/2015 – 2/28/2018 (Co-PI).
  • Department of Energy, "Cyber Resilient Energy Delivery Consortium," A sub-award from University of Illinois, $192,398 10/1/2016 – 9/30/2018 (PI).
  • Department of Energy, "Pipeline Development of Skilled Workforce in STEM through Advanced Manufacturing (STEAM)," A sub-award from North Carolina A&T State University,
  • $600,000 10/1/2018-9/30/2021 (Co-PI)


Refereed journal papers:

  1. L.H. Keel, J.A. Fleming, and S.P. Bhattacharyya, "Minimum Norm Pole Assignment via Sylvestors Equation," Contemporary Mathematics, Vol. 47, pp. 265 - 272, 1985.
  2. S.P. Bhattacharyya and L.H. Keel, "Stabilization of Linear Systems with Fixed Order Controllers," Linear Algebra and its Application, Vol. 98, pp. 57 - 76, January 1988.
  3.  L.H. Keel and S.P. Bhattacharyya, "Robust Stability and Stabilization in Parameter Space," in Linear Algebra in Signals, Systems, and Control, SIAM, pp. 576 - 593, 1988.
  4. L.H. Keel, S.P. Bhattacharyya, and J.W. Howze, "Robust Control with Structured Perturbations," IEEE Transactions on Automatic Control, Vol. 33, No. 1, pp. 68 - 78, January 1988.
  5. L.H. Keel, S.P. Bhattacharyya, and J.W. Howze, "Stabilizability Condition Using Linear Programming," IEEE Transactions on Automatic Control, Vol. 33, No. 5, pp. 460 - 463, May 1988.
  6. L.H. Keel and S.P. Bhattacharyya, "State Space Design of Low-order Stabilizers," IEEE Transactions on Automatic Control, Vol. 35, No. 2, pp. 182 - 186, February 1990.
  7. L.H. Keel and S.P. Bhattacharyya, "Matrix Equation Approach for Designing Low Order Regulator," SIAM Journal on Matrix Analysis and Applications, Vol. 11, No. 2, pp. 180 - 199, April 1990.
  8. L.H. Keel, K. Lim, and J.-N. Juang, "Robust Eigenvalue Assignment with Maximum Tolerance to System Uncertainties," AIAA Journal of Guidance, Controls and Dynamics, Vol. 14, No. 3, pp. 615 - 620, May-June 1991.
  9. L.H. Keel and S.P. Bhattacharyya, "Frequency Domain Design of Interval Controllers," Control of Uncertain Dynamic Systems, pp. 423 - 438, CRC Press, 1991.
  10.  S.P. Bhattacharyya and L.H. Keel, "Robust Stability and Control of Linear and Multilinear Interval Systems," Control and Dynamic Systems, Vol. 51, Part 2, pp. 31 - 77, Academic Press, 1992.
  11. L.H. Keel, J. Shaw and S.P. Bhattacharyya, "Robust Control of Interval Systems," in Robust Control, pp. 24 - 31, Springer Verlag, 1992.
  12. S. Ahmad, L.H. Keel, and S.P. Bhattacharyya, "Robust PID Control and Lead-Lag Compensation for Linear Interval Systems," in Robustness of Dynamic Systems with Parameter Uncertainties, pp. 251 - 260, Birhauser Press, 1992.
  13. H. Chapellat, L.H. Keel, and S.P. Bhattacharyya, "Robustness Properties of Multilinear Interval Systems," in Robustness of Dynamic Systems with Parameter Uncertainties, pp. 73- 80, Birhauser Press, 1992.
  14. S.P. Bhattacharyya and L.H. Keel, "Comments on Extreme Point Results for Robust Stabilization of Interval Plants with First Order Compensators," IEEE Transactions on Automatic Control, Vol. 38, No. 11, pp. 1734 - 1735, November 1993.
  15. L.H. Keel and S.P. Bhattacharyya, "Control System Design for Parametric Uncertainty," International Journal of Robust and Nonlinear Control, Vol. 4, pp. 87 - 100, April 1994.
  16. H. Chapellat, L.H. Keel, and S.P. Bhattacharyya, "Extremal Robustness of Multilinear Interval Systems," Automatica, Vol. 30, No. 6, pp. 1037 - 1042, June 1994.
  17. L.H. Keel and S.P. Bhattacharyya, "Robust Parametric Classical Control Design," IEEE Transactions on Automatic Control, Vol. 39, No. 7, pp. 1524 - 1530, July 1994.
  18. J.S. Lew, L.H. Keel, and J-N Juang "Quantification of Model Error via an Interval Model with Nonparametric Error Bound," AIAA Journal of Guidance, Controls, and Dynamics, Vol. 17, No. 6, pp. 1212 - 1218, November - December 1994.
  19. L.H. Keel and S.P. Bhattacharyya, "Robust Stability of Interval Matrices: A Computational Approach," International Journal of Control, Vol. 62, No. 6, pp. 1491 - 1506, December 1995.
  20. L.H. Keel and S.P. Bhattacharyya, "Phase Properties of Hurwitz Polynomials," IEEE Transactions on Automatic Control, Vol. 41, No. 5, pp. 733 - 734, May 1996.
  21. T.L. Link, J.S. Lew, E. Garcia, and L.H. Keel, "Interval Model Identification and Robustness Analysis for Uncertain Flexible Structures," IEEE Transactions on Control Systems Technology, Vol. 4, No. 4, pp. 411 - 418, July 1996.
  22. L.H. Keel and S.P. Bhattacharyya, "Robust, Optimal, or Fragile?" IEEE Transactions on Automatic Control, Vol. 42, No. 8, pp. 1098 - 1105, August 1997.
  23. L.H. Keel and S.P. Bhattacharyya, "Authors Reply for Comments on 'Robust, Fragile, or Optimal?"', IEEE Transactions on Automatic Control, Vol. 43, No. 9, pp. 1268, September 1998.
  24. L.H. Keel and S.P. Bhattacharyya, "A New Proof of Jury Test," Automatica, Vol. 35, No. 2, pp. 251 - 258, February 1999.
  25. L.H. Keel and S.P. Bhattacharyya, "Robust Control Under Parametric Uncertainty, Part I: Analysis," Use of Symbolic Methods in Control System Analysis and Design (Neil Munro Ed.), pp. 81 - 113, IEE Control Engineering Series, Vol. 56, 1999.
  26. L.H. Keel and S.P. Bhattacharyya, "Robust Control Under Parametric Uncertainty, Part II: Design," Use of Symbolic Methods in Control System Analysis and Design (Neil Munro Ed.), pp. 203 - 226, IEE Control Engineering Series, Vol. 56, 1999.
  27. L.H. Keel and S.P. Bhattacharyya, "Robust Stability and Performance with Fixed Order Controllers," Automatica, Vol. 35, No. 10, pp. 1717 - 1724, October 1999.
  28. S.S. Ahmad, J.S. Lew, and L.H. Keel, "Robust Control of Flexible Structures against Structural Damage," IEEE Transactions on Control Systems Technology, Vol. 8, No. 1, pp. 170 - 182, January 2000.
  29. O. Adetona, E. Garcia, L.H. Keel, "A New Method for the Control of Discrete Nonlinear Dynamic Systems using Neural Networks," IEEE Transactions on Neural Networks, Vol. 11, No. 1, pp. 102 - 112, January 2000.
  30. O. Adetona, S. Sathananthan, and L.H. Keel, "An extension of the Popov Criterion," Dynamic Systems & Applications, Vol. 9, No. 2, pp. 323 - 332, June 2000.
  31. L.H. Keel and S.P. Bhattacharyya, "Stability Margins and Digital Implementation of Controllers," in Digital Controller Implementation and Fragility: A Modern Perspective (R.S.H. Istepanian and J.F. Whidborne Eds.), pp. 13 - 24, Springer, September 2001.
  32. L.H. Keel and S.P. Bhattacharyya, "Root Counting, Phase Unwrapping, Stability and Stabilization of Discrete Time Systems," Linear Algebra and its Applications, Vol. 351 - 352, pp. 501 - 518, August 2002.
  33. L.H. Keel and S.P. Bhattacharyya, "Phase Conditions for Schur Polynomials," IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications, Vol. 49, No. 10, pp. 1509 - 1514, October 2002.
  34. L.H. Keel, J.I. Rego, and S.P. Bhattacharyya, "A New Approach to Digital PID Controller Design," IEEE Transactions on Automatic Control, Vol. 48, No. 4, pp. 687 - 692, April 2003.
  35. R.N. Tantaris, L.H. Keel, and S.P. Bhattacharyya, "Stabilization of Discrete Time Systems by First Order Controllers," IEEE Transactions on Automatic Control, Vol. 48, No. 5, pp. 858 - 861, May 2003.
  36. S. Sathananthan and L.H. Keel, "Optimal Practical Stabilization and Controllability of Systems with Markovian Jumps," Nonlinear Analysis, Vol. 54, No. 6, pp. 1011 - 1027, September 2003.
  37. Y.C. Kim, L.H. Keel, and S.P. Bhattacharyya, "Transient Response Control via Characteristic Ratio Assignment," IEEE Transactions on Automatic Control, Vol. 48, No. 12, pp. 2238 - 2245, December, 2003.
  38. S. Sathananthan and L.H. Keel, "Convergence and Stability of Stochastic Hereditary Iterative Process," Dynamics of Continuous, Discrete and Impulse Systems, Series A: Mathematical Analysis, Vol. 11, pp. 81 - 104, January 2004.
  39. O. Adetona, S. Sathananthan, and L.H. Keel, "Robust Adaptive Control of Non-affine Nonlinear Plants with Small Input Signal Changes," IEEE Transactions on Neural Networks, Vol. 15, No. 2, pp. 408 - 416, March 2004.
  40. S. Sathananthan and L.H. Keel, "Connective Practical Stabilization of Large-scale Decentralized Controlled Stochastic Systems," Dynamics of Continuous, Discrete, and Impulsive Systems, Series B: Algorithms and Applications, Vol. 11, pp. 569 - 588, August 2004.
  41. R.N. Tantaris, L.H. Keel, and S.P. Bhattacharyya, "Stabilization by Three Term Controllers," Dynamics of Continuous, Discrete, and Impulse Systems, Series B: Algorithms and Applications, Vol. 11, pp. 411 - 427, August 2004.
  42. R.N. Tantaris, L.H. Keel, and S.P. Bhattacharyya, "H1 Design with First Order Controllers," IEEE Transactions on Automatic Control, Vol. 51, No. 8, pp. 1343 - 1347, August, 2006.
  43. L.H. Keel, S. Mitra, and S.P. Bhattacharyya, "Data Driven Synthesis of Three Term Digital Controllers," SICE Journal of Control, Measurement, and System Integration, Vol. 1, No. 2, pp. 102 - 110, March 2008.
  44. S. Sathananthan, O. Adetona, C. Beane, and L.H. Keel, "Feedback Stabilization of Markov Jump Linear Systems with Time-varying Delay," Stochastic Analysis and Applications, Vol. 26, Issue 3, pp. 577 - 594, May/June 2008.
  45. L.H. Keel and S.P. Bhattacharyya, "Controller Synthesis Free of Analytical Models: Three Term Controllers," IEEE Transactions on Automatic Control, Vol. 53, No. 6, pp. 1353 - 1369, July 2008.
  46. S. Sathananthan, C. Beane, and L.H. Keel, "Delay-dependent Criteria for Robust Stabilization of Markovian Switching Networks with Time-varying Delay," Stochastic Analysis and Applications, Vol. 27, Issue 4, pp. 694 - 712, July 2009.
  47. L.H. Keel and S.P. Bhattacharyya, "Structural Stability and Minimal Realization," IEEE Transactions on Automatic Control, Vol. 55, No. 4, pp. 1014 - 1017, April, 2010.
  48. S. Sathananthan, C. Beane, G.S. Ladde, and L.H. Keel, "Stabilization of Stochastic Systems under Markovian Switching," Nonlinear Analysis: Hybrid Systems, Vol. 4, No. 4, pp. 804 - 817, November 2010.
  49. L.H. Keel and S.P. Bhattacharyya, "A Bode Plot Characterization of All Stabilizing Controllers," IEEE Transactions on Automatic Control, Vol. 55, No. 11, pp. 2650 - 2654, November 2010.
  50. L.H. Keel and S.P. Bhattacharyya, "Robust Stability via Sign-definite Decomposition," IEEE Transactions on Automatic Control, Vol. 56, No. 1, pp. 140 - 145, January 2011.
  51. M.J. Knap, L.H. Keel, and S.P. Bhattacharyya, "Robust Hurwitz Stability via Sign-definite Decomposition," Linear Algebra and Its Applications, Vol. 434, Issue 7, pp. 1663 - 1676, April 2011.
  52. S. Sathananthan, A. Strong, M.J. Knap, and L.H. Keel, "Robust Stability and Stabilization of a Class of Nonlinear Discrete-time Stochastic Systems with State and Controller Dependent Noise," Journal of Nonlinear Systems and Applications, Vol. 2, No. 1-2, pp. 47-53, 2011.
  53. L. Hong, S. Sathananthan, and L.H. Keel, "Design of Robust Stochastic Controller for Stabilizing Queues of TCP/AQM System," Stochastic Analysis and Applications, Vol. 30, Issue 1, pp. 146 - 159, January, 2012.
  54. S. Sathananthan, N.J. Jameson, M. Knap, and L.H. Keel, "Hybrid Impulsive State Feedback Control of Markovian Switching Linear Stochastic Systems," Communications in Applied Analysis, Vol. 16, No. 4, pp. 665 - 686, 2012.
  55. L.H. Keel and S.P. Bhattacharyya, "Modern PID Control: Stabilizing Sets and Multiple Performance Specifications," in PID Control in the Third Millennium, Advances in Industrial Control (R. Vilanova and A. Visioli Eds.), pp. 319-348, Springer, 2012.
  56. S. Sathananthan, M.J. Knap, A. Strong, and L.H. Keel, "Robust Stability and Stabilization of a Class of Nonlinear Discrete-time Stochastic Systems: An LMI Approach," Applied Mathematics and Computation, Vol. 219, Issue 4, pp. 1988 - 1997, November 2012.
  57. S. Sathananthan, M.J. Knap, and L.H. Keel, "Robust Control of Markovian Switching Stochastic Systems with Noise Dependent States and Inputs," Stochastic Analysis and Applications, Vol. 31, pp. 47 - 61, January 2013.
  58. S. Sathananthan, M. J. Knap, and L.H. Keel, "Optimal Guaranteed Cost Control of Stochastic Discrete-time Systems under Markovian Regime Switching," Dynamics of Continuous, Discrete, and Impulsive Systems, Series A, Vol. 20, pp. 253 - 271, January, 2013.
  59. S. Sathananthan, M.J. Knap, and L.H. Keel, "Robust Stability and Stabilization of a Class of Nonlinear Itˆo-type Stochastic Systems via Linear Matrix Inequalities," Stochastic Analysis and Applications, Vol. 31, pp. 235 - 249, February 2013.
  60. L.H. Keel, T.F. Stratton, and S.P. Bhattacharyya, "Robust Hurwitz and Schur Stability via Interval Positivity," Numerical Linear Algebra with Applications, Vol. 20, Issue 2, pp. 281 - 290, March 2013.
  61. S. Sathananthan, M. Knap, and L.H. Keel, "Optimal Guaranteed Cost Control of Stochastic Discrete-time Systems with States and Input Dependent Noise under Markovian Switching," Stochastic Analysis and Applications, Vol. 31, pp. 876 - 893, August 2013.
  62. S. Sathananthan, N. Jameson, I. Lyatuu, and L.H. Keel, "Hybrid Impulsive Control of Stochastic Systems with Multiplicative Noise under Markovian Switching," Stochastic Analysis and Applications, Vol. 31, pp. 894 - 911, August 2013.
  63. M.J. Knap, L.H. Keel, and S.P. Bhattacharyya, "Controller design and the Gauss-Lucas theorem," IEEE Transactions on Automatic Control, Vol. 58, No. 11, pp. 2940 - 2944, November 2013.
  64. P. Kallakuri, L.H. Keel, and S.P. Bhattacharyya, "A measurement-based approach to designing fault-tolerant controllers for multivariable systems," International Journal of Adaptive Control and Signal Processing, Vol. 30, Issue 8-10, pp. 1355 – 1374, 2016.

Chapters for on-line:
1. L.H. Keel, "Robustness under real parameter uncertainty," in Control Systems, Robotics, and Automation, [Ed. Heinz Unbehauen], in Encyclopedia of Life Support Systems (EOLSS), Developed under the Auspices of the UNESCO, Eolss Publishers, Oxford, UK, [http://www.eolss.net].

Refereed conference papers and presentations:

  1. 1. L.H. Keel, J.A. Fleming, S.P. Bhattacharyya, "Minimum norm pole assignment via Sylvestors equation," Proceedings of the 21st Allerton Conference on Communications, Control and Computers, Champaign-Urbana, IL, October 1983.
  2. L.H. Keel and S.P. Bhattacharyya, "An algorithm for low order stabilizing compensator design via Sylvestors equation," Proceedings of the 2nd IEEE Symposium on Computer Aided Control System Design, Santa Barbara, CA, March 1985.
  3. L.H. Keel and S.P. Bhattacharyya, "Compensator design for robust eigenstructure assignment via Sylvestors equation," Proceedings of American Control Conference, Boston, MA, June 1985.
  4. L.H. Keel, J.W. Howze, and S.P. Bhattacharyya, "Robust compensation via pole assignment," Proceedings of American Control Conference, Boston, MA, June 1985.
  5. L.H. Keel and S.P. Bhattacharyya, "Low order stabilizer design using Hurwitz conditions," Proceedings of the 24th IEEE Conference on Decision and Control, pp. 693 - 696, Ft Lauderdale, FL, December 1985.
  6. L.H. Keel, J.W. Howze, and S.P. Bhattacharyya, "Multivariable controller design for optimal robustness," Proceedings of the IFAC Workshop, Brazil, September 1985
  7. L.H. Keel and S.P. Bhattacharyya, "Robust stabilization against transfer function coefficient perturbations," Proceedings of the SIAM Conference on Linear Algebra and System Theory, Boston, MA, August 1986.
  8. L.H. Keel, J.W. Howze, and S.P. BHattacharyya, "Multivariable controller design for stability under real parameter variations," Proceedings of the 10th IFAC World Congress, Munich, West Germany, July 1987.
  9. L.H. Keel, S.P. Bhattacharyya, and J.W. Howze, "Robust control with structured perturbations," Proceedings of the 26th IEEE Conference on Decision and Control, pp. 2064- 2069, Los Angeles, CA, December 1987.
  10. H. Chapellat, S.P. Bhattacharyya, and L.H. Keel, "Stability margin for Hurwitz polynomials," Proceedings of the 27th IEEE Conference on Decision and Control, pp. 1392 - 1398, Austin, TX, December 1988.
  11. L.H. Keel and S.P. Bhattacharyya, "Robust structured eigenstructure assignment," SIAM Conference on Controls in 90s, San Francisco, CA, May 1989.
  12. L.H. Keel, Kyong B. Lim, and J.-N. Juang, "Structured robustness with suboptimal responses for linear state space models," Proceedings of 1989 AIAA Guidance, Navigation, and Control Conference, AIAA-89-3611-CP, pp. 1519 - 1524, Boston, MA, August 1989.
  13. B. Shafai and L.H. Keel, "New pole placement algorithm: polynomial matrix approach," Proceedings of 1990 American Control Conference, Vol. 2, pp. 1684 - 1685, San Diego, CA, May, 1990.
  14. B.Y. Harris and L.H. Keel, "Reliable Controller Design Against Arbitrary Loop Failures," 1990 SIAM Annual Meeting, Chicago, IL, July 1990.
  15. B. Shafai, L.H. Keel, and S. Beale, "Zero Assignment and Loop Transfer Recovery in LQG Design," Proceedings of the 29th IEEE Conference on Decision and Control, pp. 1217 - 1221, Honolulu, Hawaii, December, 1990.
  16. L.H. Keel and S.P. Bhattacharyya, "Extremal Gain and Phase Margins for Interval Plants," International Workshop on Robust Control, San Antonio, TX, March 1991.
  17. L.H. Keel, J. Shaw and S.P. Bhattacharyya, "Robust Control of Interval Systems," International Workshop on Robust Control, Tokyo, Japan, June 1991.
  18. L.H. Keel and S.P. Bhattacharyya, "Optimum Design of Robust One-Parameter Controllers for Interval Plants," Proceedings of the 1991 IFAC Symposium on Design Methods for Control Systems, Zurich, Switzerland, September 4 - 6, 1991.
  19. L.H. Keel and S.P. Bhattacharyya, "Extremal Gain and Phase Margins for Interval Systems," Proceedings of the 1991 AIAA Guidance, Navigation and Control Conference, pp. 1496 - 1500, New Orleans, LA., August 1991.
  20. H. Chapellat, L.H. Keel and S.P. Bhattacharyya, "Stability Margin for Multilinear Interval Control Systems," Proceedings of the 1991 IEEE Conference on Decision and Control, Brighton, United Kingdom, December 1991.
  21. S. Ahmad, L.H. Keel and S.P. Bhattacharyya, "Computer Aided Robust Control Design for Interval Control Systems," Proceedings of the 1992 IEEE Symposium on Computer Aided Control System Design, pp. 82 - 89, Napa, CA., March 7 - 19, 1992.
  22. S. Ahmad and L.H. Keel, "Robust Lead-lag Compensation for the Family of Uncertain Linear Systems," Proceedings of the 1992 IEEE Symposium on Circuits and Systems, Vol. 6, pp. 2716 - 2719, San Diego, CA., May 1992.
  23. S. Ahmad, L.H. Keel, and S.P. Bhattacharyya, "Robust PID Control and Lead-Lag Compensation for Linear Interval Systems," International Workshop on Robust Control, Ascona, Switzerland, April 12 - 17, 1992.
  24. H. Chapellat, L.H. Keel, and S.P. Bhattacharyya, "Robustness Properties of Multilinear Interval Systems," International Workshop on Robust Control, Ascona, Switzerland, April 12- 17, 1992.
  25. L.H. Keel and S.P. Bhattacharyya, "Control System Design for Parametric Uncertainty," Proceedings of the 1st Quantitative Feedback Theory Symposium, pp. 435 - 455, Wright Pattersen Air Force Base, OH, August 3 - 4, 1992.
  26. L.H. Keel and S.P. Bhattacharyya, "Stability Margins for Multilinear Interval Systems via Phase Conditions: A Unified Approach," Proceedings of the 1993 American Control Conference, pp. 3112 - 3116, San Francisco, CA, June 2 - 4, 1993.
  27. L.H. Keel and S.P. Bhattacharyya, "Vertex Results in Robust Stability," Proceedings of the 1993 IFAC World Congress, Sydney, Australia, July 19 - 23, 1993.
  28. L.H. Keel and S.P. Bhattacharyya, "Parametric Stability Margin for Multilinear Interval Control Systems," Proceedings of the 1993 American Control Conference, pp. 262 - 266, San Francisco, CA, June 2 - 4, 1993.
  29. L.H. Keel, "Invariance of Matrix Inertia under Parameter Variations," Third SIAM Conference on Linear Algebra: Signals, Systems, Control, Seattle, WA, August 16 - 19, 1993.
  30. J.S. Lew, L.H. Keel, and J-N. Juang, "Quantification of Model Error via an Interval Model with Nonparametric Error Bound," Proceedings of the 1993 AIAA Guidance, Navigation, and Control Conference, AIAA-93-3841-CP, pp. 1254 - 1263, Montery, CA, August, 1993.
  31. S. Bhattacharyya, L.H. Keel, and S.P. Bhattacharyya, "Robust Stabilizer Synthesis for Interval Plants Using Nevanlina-Pick Theory," Proceedings of the 32nd IEEE Conference on Decision and Control, pp. 3003 - 3008, San Antonio, TX, December 15 - 17, 1993.
  32.  J.S. Lew, T.L. Link, E. Garcia, and L.H. Keel, "Interval Model Identification for Flexible Structures with Uncertain Parameters," Proceedings of the 1994 AIAA/ASME Adaptive Structures Forum, AIAA-94-1735-CP, pp. 42 - 47, Hilton Head, SC, April 21 - 22, 1994.
  33. L.H. Keel, J.S. Lew, and S.P. Bhattacharyya, "System Identification Using Interval Dynamic Models," Proceedings of the 1994 American Control Conference, pp. 1537 - 1542, Baltimore, MD, June 29 - July 1, 1994.
  34. T.L. Link, J.S. Lew, E. Garcia, and L.H. Keel, "Robustness Verification for Flexible Structures via Interval Control Systems," Proceedings of 1994 AIAA Conference on Guidance, Navigation, and Control, AIAA-94-3570-CP, pp. 252 - 260, Scollsdale, AZ, August 1 - 3, 1994.
  35. L.H. Keel and S.P. Bhattacharyya, "Robust Stability of Interval Matrices: A Computational Approach," Proceedings of the 1994 Asian Control Conference, Tokyo, Japan, July 27 - 30, 1994.
  36. S.P. Bhattacharyya and L.H. Keel, "Robust Stability and Control," Proceedings of the 3rd IFAC Symposium on Advances in Control Education, Tokyo, Japan, August 1 - 2, 1994.
  37. L.H. Keel and S.P. Bhattacharyya, "Robust, Optimal, Fragile?" Bernoulli International Workshop on Robust Control and Applications, Groningen, Netherlands, August 21 - 25, 1995.
  38. L.H. Keel and S.P. Bhattacharyya, "Phase Properties of Hurwitz Polynomials," Proceedings of the 34th IEEE Conference on Decision and Control, pp. 4265 - 4266, New Orleans, LA, December 13 - 15, 1995.
  39. Y.C. Kim and L.H. Keel, "Robust Stabilization of a Magnetic Levitation Vehicle," Proceedings of the 1996 International Symposium on Intelligent Automation and Control, Vol. 4, pp. 40- 408, Montpellier, France, May 27 - 30, 1996.
  40. L.H. Keel, J.W. Howze, and S.P. Bhattacharyya, "Robust Tracking and Disturbance Rejection with Two DOF Controllers and Distributed Internal Models," Proceedings of the 1997 American Control Conference, Vol. 6, pp. 3892 - 3896, Albuquerque, NM, June 4 - 6, 1997.
  41. L.H. Keel and S.P. Bhattacharyya, "Robust, Fragile or Optimal?," Proceedings of the 1997 American Control Conference, Vol. 2, pp. 1307 - 1313, Albuquerque, NM, June 4 - 6, 1997.
  42. M.T. Ho, A. Datta, L.H. Keel, and S.P. Bhattacharyya, "Robust and optimal PID controller design," Proceedings of the 1997 IFAC Symposium on Robust Control Design, Budapest, Hungary, June 25 - 27, 1997.
  43. L.H. Keel and S.P. Bhattacharyya, "A Linear Programming Approach to Controller Design," Proceedings of the 36th IEEE Conference on Decision and Control, pp. 2139 - 2148, San Diego, CA, Dec. 1997.
  44. L.H. Keel and S.P. Bhattacharyya, "Root Locus Explanation of Jurys Test," Proceedings of the 1998 World Automation Congress, Vol. ISIAC, pp. 154.1 - 154.6, Anchorage, Alaska, May 10 - 14, 1998.
  45. Y.C. Kim, H.I. Kang, and L.H. Keel, "Parametric Stability Test of a Family of Polynomials with Nonlinearly Perturbed Coefficients," Proceedings of the 1998 World Automation Congress, Vol. ISIAC, pp. 116.1 - 116.6, Anchorage, Alaska, May 10 - 14, 1998.
  46. S.S. Ahmad, J.S. Lew, and L.H. Keel, "Robust Control of Flexible Structures against Structural Damage," Proceedings of the 1998 American Control Conference, Vol. 4, pp. 2460- 2464, Philadelphia, PA, June 24 - 26, 1998.
  47. L.H. Keel and S.P. Bhattacharyya, "A New Proof of Jury Test," Proceedings of the 1998 American Control Conference, Vol. 6, pp. 3694 - 3698, Philadelphia, PA, June 24 - 26, 1998.
  48. L.H. Keel and S.P. Bhattacharyya, "Stability Margins and Digital Implementation of Controllers," Proceedings of the 1998 American Control Conference, Vol. 5, pp. 2852 - 2856, Philadelphia, PA, June 24 - 26, 1998.
  49. J.-S. Lew, S.S. Ahmad, and L.H. Keel, "Robust Control of Identified Reduced-Interval State Space Model," Proceedings of the 1998 AIAA Guidance, Navigation, and Control Conference and Exhibit, pp. 1609 - 1618, Boston, MA, August 10 - 12, 1998.
  50. L.H. Keel and S.P. Bhattacharyya, "Controller Design Using Linear Programming," Proceedings of the 1998 ASME Winter Annual Meeting and Exposition, Anaheim, CA, Nov. 1998.
  51. L.H. Keel and S.P. Bhattacharyya, "Robust Control Design via Linear Programming," Proceedings of the 1998 IEEE TENCON International Conference, New Delhi, India, Dec. 17- 19, 1998.
  52. L.H. Keel and S.P. Bhattacharyya, "On Root Locus Traps," Proceedings of the 1999 American Control Conference, pp. 4310 - 4315, San Diego, CA, June 2 - 4, 1999.
  53. O. Adetona, E. Garcia, and L.H. Keel, "Stable Adaptive Control of Unknown Nonlinear Dynamic Systems Using Neural Networks," Proceedings of the 1999 American Control Conference, pp. 1072 - 1076, San Diego, CA, June 2 - 4, 1999.
  54.  L.H. Keel and S.P. Bhattacharyya, "Analytic Conditions for Stabilizability," Proceedings of the 7th IEEE Mediterranean Conference on Control and Automation, pp. 1177 - 1193, Haifa, Israel, June 28 - 30, 1999.
  55. L.H. Keel and S.P. Bhattacharyya, "A Linear Programming Approach to Control Design," Proceedings of the 1999 IFAC Workshop on Robust Control, June 30 - July 2, 1999, Hong Kong, China.
  56. S.S. Ahmad, J.-S. Lew, and L.H. Keel, "Fault Tolerant Controller Design for Large Space Structures," Proceedings of 1999 IEEE International Conference on Control Applications, pp. 63 - 68, Kohala Coast-Island of Hawaii, Hawaii, August 22 - 27, 1999.
  57. L.H. Keel and S.P. Bhattacharyya, "Interval Problems in Robust Control," Proceedings of the 1999 Conference on Trends in Information Technology (CIT99), pp. 219 - 223, Bhubaneswar, India, December 20-22, 1999.
  58. L.H. Keel and S.P. Bhattacharyya, "On Stabilizing Gains for Digital Control Systems," Proceedings of the 2000 IEEE International Conference on Industrial Technology (IEEE ICIT2000), Goa, India, January 19-22, 2000.
  59. O. Adetona, S. Sathananthan, and L.H. Keel, "A Neural-control Method for Nonlinear Plants," Proceedings of the 2000 American Control Conference, Chicago, IL, June 28 - 30, 2000.
  60. L.H. Keel and S.P. Bhattacharyya, "A Generalization of Mikhailovs Criterion with Applications," Proceedings of the 2000 American Control Conference, Chicago, IL, June 28 - 30, 2000.
  61. L.H. Keel and S.P. Bhattacharyya, "A Lower Bound on the Order of Stabilizing Controllers," Proceedings of the 2000 American Control Conference, Chicago, IL, June 28 - 30, 2000.
  62. L.H. Keel and S.P. Bhattacharyya, "Analytic Determination of Stabilizing Gains for Digital Control Systems," Proceedings of the 2001 American Control Conference, Arlington, VA, June 25 - 27, 2001.
  63. O. Adetona, S. Sathananthan, and L.H. Keel, "Robust Nonlinear Adaptive Control using Neural Networks," Proceedings of the 2001 American Control Conference, Arlington, VA, June 25 - 27, 2001.
  64. L.H. Keel and S.P. Bhattacharyya, "Robustness Analysis via Tchebyshev Representations," Proceedings of the 2001 IEEE Conference on Decision and Control, Orlando, FL, December 4 - 7, 2001.
  65. L.H. Keel and S.P. Bhattacharyya, "Root Counting and Phase Unwrapping with respect to the Unit Circle with Applications," Proceedings of the 2001 IEEE Conference on Decision and Control, Orlando, FL, December 4 - 7, 2001.
  66. O. Adetona, L.H. Keel, L.G. Horta, D.P. Cadogan, G.H. Sapna, and S.E. Scarborough, "Description of New Inflatable/Rigidizable Hexapod Structure Testbed for Shape and Vibration Control," Proceedings of the 43rd AIAA/ASME/ASCE/AHS Structures, Structural Dynamics and Materials Conference, Denver, CO, April 22-25, 2002.
  67. Y.C. Kim, L.H. Keel, and S.P. Bhattacharyya, "Transient response control via characteristic ratios assignment," Proceedings of the 2002 American Control Conference, Anchorage, AK, May 8 - 10, 2002.
  68. R.N. Tantaris, L.H. Keel, and S.P. Bhattacharyya, "Stabilization of continuous-time systems by first order controllers," Proceedings of the 10th IEEE Mediterranean Conference on Control and Automation, Lisbon, Portugal, July 9 - 12, 2002.
  69. L.H. Keel, J.I. Rego, and S.P. Bhattacharyya, "Digital PID design for maximally deadbeat and time-delay tolerance," Proceedings of the 2002 IFAC World Congress, Barcelona, Spain, July 21 - 26, 2002.
  70. L.H. Keel and S.P. Bhattacharyya, "Phase conditions for Schur polynomials," Proceedings of the 2002 IFAC World Congress, Barcelona, Spain, July 21 - 26, 2002.
  71. Y.C. Kim, L.H. Keel and S. Manabe, "Controller design for time domain specifications," Proceedings of the 2002 IFAC World Congress, Barcelona, Spain, July 21 - 26, 2002.
  72. R.N. Tantaris, L.H. Keel, and S.P. Bhattacharyya, "Stabilization of discrete time systems by first order controllers," Proceedings of the 2002 IEEE Conference on Decision and Control, Las Vegas, NV, December 10 - 13, 2002.
  73. R.N. Tantatis, L.H. Keel, and S.P. Bhattacharyya, "Gain/phase margin design with first order controllers," Proceedings of the 2003 American Control Conference, Denver, CO, June 4 - 6, 2003.
  74. K.S. Kim, Y.C. Kim, L.H. Keel, and S.P. Bhattacharyya, "PID controller design with time response specifications," Proceedings of the 2003 American Control Conference, Denver, CO, June 4 - 6, 2003.
  75. Y.C. Kim, L.H. Keel, and S.P. Bhattacharyya, "Characteristic ratio assignment: An application to a benchmark problem," Proceedings of the 4th IFAC Symposium on Robust Control Design (ROCOND 2003), Milan, Italy, June 25- 27, 2003.
  76. R.N. Tantaris, L.H. Keel, and S.P. Bhattacharyya, "H1 design with first order controllers," Proceedings of the 2003 IEEE Conference on Decision and Control, Maui, HI, December 9 - 12, 2003.
  77. L.H. Keel, and S.P. Bhattacharyya, "Minimal or maximal realizations?," Proceedings of the 2003 IEEE Conference on Decision and Control, Maui, HI, December 9 - 12, 2003.
  78. O. Adetona, S. Sathananthan, and L.H. Keel, "Approximation of the NARMA model of non- affine plants," Proceedings of the 2004 American Control Conference, Boston, MA, June 30 - July 2, 2004.
  79. S. Sathananthan, O. Adetona, and L.H. Keel, "Stability analysis of large scale discrete-time systems with delay," Proceedings of the 10th IFAC/IFORS/IMACS/IFIP Symposium on Large Scale Systems: Theory and Applications, Osaka, Japan, July 26 - 28, 2004.
  80. L.H. Keel and S.P. Bhattacharyya, "Direct synthesis of first order controllers from frequency response measurements," Proceedings of the 2005 American Control Conference, Portland, OR, June 8 - 10, 2005.
  81. L.H. Keel and S.P. Bhattacharyya, "PID Controller Synthesis Free of Analytical Models," Proceedings of the 16th IFAC World Congress, Prague, Czech Republic, July 4 - 8, 2005.
  82. S. Sathananthan, O. Adetona, and L.H. Keel, "Asymptotic stability results for large-scale nonlinear discrete-time systems," Proceedings of the DCDIS2005 4th International Conference on Engneering Applications and Computational Algorithms, Guelph, Ontario, Canada, July 27 - 29, 2005.
  83. O. Adetona, L.H. Keel, J.D. Oakley, K. Kappus, M.S.Whorton, Y.K. Kim, and J. M. Rakoczy, "Model correlation study of a retractable boom for a solar-sail spacecraft," Proceedings of the 53rd Joint Army-Navy-NASA-Air Force (JANNAF) Propulsion Meeting, Monterey, CA, December 5 - 8, 2005.
  84. L.H. Keel and S.P. Bhattacharyya, "Data driven synthesis of three term digital controllers," Proceedings of the 2006 American Control Conference, Minneapolis, MN, June 14 - 16, 2006.
  85. O. Adetona, L.H. Keel, and M.S. Whorton, "Application of semi-active control techniques to the damping suppression problem of solar sail booms," Proceedings of the 54th Joint Army- Navy-NASA-Air Force (JANNAF) Propulsion Meeting, Denver, CO, May 14 - 17, 2007.
  86. M.S. Whorton, Y.K. Kim, J. Oakley, O. Adetona and L.H. Keel, "Recent developments in smart adaptive structures for solar sailcraft," Proceedings of the 54th Joint Army-Navy- NASA-Air Force (JANNAF) Propulsion Meeting, Denver, CO, May 14 - 17, 2007.
  87. Y.C. Kim, L.H. Keel, and S.P. Bhattacharyya, "Computer aided control system design: multiple design objectives," Proceedings of the 2007 European Control Conference, pp. 512 - 517, Kos, Greece, July 2 - 5, 2007.
  88. S. Mitra, L.H. Keel, and S.P. Bhattacharyya, "Data based design of digital PID controllers," Proceedings of the 2007 American Control Conference, New York, NY, July 11 - 13, 2007.
  89. S. Mitra, L.H. Keel, and S.P. Bhattacharyya, "Data-robust design of PID controllers via interval linear programming," Proceedings of the 3rd IFAC Symposium on System, Structure, and Control, Foz do Iguasu, Brazil, October 17 - 19, 2007.
  90. L.H. Keel and S.P. Bhattacharyya, "Data based interval controller design," Proceedings of the 46th IEEE Conference on Decision and Control, New Orleans, LA, December 12 - 14, 2007.
  91. S. Sathananthan, C. Beane, and L.H. Keel, "Delay-dependent stability criteria for Markovian switching networks with time-varying delay," Proceedings of the 17th IFAC World Congress, pp. 2625 - 2630, Seoul, Korea, July 6 - 11, 2008.
  92. L.H. Keel and S.P. Bhattacharyya, "New approaches to control education," Proceedings of the 17th IFAC World Congress, pp. 10359 - 10364, Seoul, Korea, July 6 - 11, 2008.
  93. L.H. Keel and S.P. Bhattacharyya, "Fixed order multivariable controller synthesis: A new algorithm," Proceedings of the 46th IEEE Conference on Decision and Control, pp. 977 - 982, Cancun, Mexico, December 9 - 11, 2008.
  94. L.H. Keel and S.P. Bhattacharyya, "A frequency response parametrization of all stabilizing controllers for discrete time systems," Proceedings of the 10th International Conference on Control, Automation, Robotics and Vision, pp. 1475 - 1478, Hanoi, Vietam, December 17 - 20, 2008.
  95. L.H. Keel, B. Shafai, and S.P. Bhattacharyya, "A frequency response parametrization of all stabilizing controllers for continuous-time systems," Proceedings of the 2009 American Control Conference, pp. 3724 - 3729, St. Louis, MO, June 10 - 12, 2009.
  96. L.H. Keel and S.P. Bhattacharyya, "Fixed order multivariable discrete-time control," Proceedings of the 48th IEEE Conference on Decision and Control, pp. 6154 - 6159, Shanhai, China, December 16 - 18, 2009.
  97. L.H. Keel and S.P. Bhattacharyya, "On computing the inverse of a rational matrix," Proceedings of the 47th IEEE Conference on Decision and Control, pp. 140 -144, Shanhai, China, December 16 - 18, 2009.
  98. M.J. Knap, L.H. Keel, and S.P. Bhattacharyya, "Robust stability of complex systems with applications to performance attainment problems," Proceedings of the 2010 American Control Conference, pp. 3907 - 3912, Baltimore, MD, June 30 - July 2, 2010.
  99. S. Sathananthan, M.J. Knap, and L.H. Keel, "Robust control of stochastic systems with noise dependent states and inputs under Markovian switching," Proceedings of the 2010 American Control Conference, pp. 904 - 909, Baltimore, MD, June 30 - July 2, 2010.
  100. S. Sathananthan, M.J. Knap, and L.H. Keel, "Robust stability and stabilization of a class of non-linear stochastic systems with state and controller dependent noise," Proceedings of the IEEE Conference on Decision and Control, pp. 3355 - 3360, Atlanta, GA, December 15 - 17, 2010.
  101. L.H. Keel and S.P. Bhattacharyya, "Nyquist meets Bode on the z-plane," Proceedings of the International Symposium on Electronic System Design (ISED), pp. 259 - 264, Bhubaneswar, India, December 20 - 22, 2010.
  102. L.H. Keel, T.F. Stratton, and S.P. Bhattacharyya, "Robust stability via interval positivity," Proceedings of the 2011 World Conference on Soft Computing, paper no. 127, San Francisco, CA, May 22 - 26, 2011.
  103. S. Sathananthan, M.J. Knap, and L.H. Keel, "Guaranteed cost H1 control of linear stochastic Markovian switching systems," Proceedings of the 18th IFAC World Congress, pp. 5459 - 5464, Milano, Italy, August 28 - September 2, 2011.
  104. L. Hong, S. Sathananthan, and L.H. Keel, "Robust stochastic flow management for TCP/AQM system," Proceedings of the 18th IFAC World Congress, pp. 7474 - 7479, Milano, Italy, August 28 - September 2, 2011.
  105. P. Kallakuri, L.H. Keel, and S.P. Bhattacharyya, "Data based design of PID controllers for a magnetic levitation experiment," Proceedings of the 18th IFAC World Congress, pp. 10231 - 10236, Milano, Italy, August 28 - September 2, 2011.
  106. S. Shetty, S.K. Mukkavilli, and L.H. Keel, "An integrated machine learning and control-theoretic method for mining concept drifting data streams," Proceedings of the IEEE Confernece on Homeland Security Technologies, Boston, MA, Nov 14-17, 2011.
  107. N. Mohsenizadeh, S. Darbha, L.H. Keel, and S.P. Bhattacharyya, "Model-free synthesis of fixed structure stabilizing controllers using the rate of change of phase," Proceeding of the 2012 IFAC Conference on Advances in PID Control, Brescia, Italy, March 28-30, 2012.
  108. M.J. Knap, L.H. Keel, and S.P. Bhattacharyya, "Controller Design and Gauss-Lucas Theorem," Proceedings of the 2012 American Control Conference, pp. 6697 - 6701, Montreal, Canada, June 27 - 29, 2012.
  109. P. Kallakuri, L.H. Keel, and S.P. Bhattacharyya, "Multivariable controller design with integrity," Proceedings of the 2013 American Control Conference, pp. 5166 - 5171, Washington, DC, June 17 - 19, 2013.
  110. L.H. Keel and S.P. Bhattacharyya, "Measurement-based Model Reduction in Linear Systems," Proceedings of the 6th International Symposium on Communications, Control & Signal Processing, pp. 53-56, Athens, Greece, May 21-23, 2014.
  111. P. Kallakuri and L.H. Keel, "A Measurement Based Approach to Fault Tolerant Control for TITO Systems," Proceedings of the 6th International Symposium on Communications, Control & Signal Processing, pp. 57-60, Athens, Greece, May 21-23, 2014.
  112. P. Kallakuri and L.H. Keel, "Reliable Measurement-based System Design: A New Paradigm," Proceeding of the IFAC World Congress, pp. 9394 – 9399, Cape Town, South Africa, August 24-29, 2014.
  113. L.H. Keel and S.P. Bhattacharyya, "An Extremal Result for Unknown Interval Linear Systems, Proceedings of the IFAC World Congress, pp. 6502 – 6507, Cape Town, South Africa, August 24-29, 2014.
  114. D.N. Mohsenizadeh, L.H. Keel, and S.P. Bhattacharyya, "An Equivalent Plant Representation for Unknown Control Systems," Proceedings of the 2014 ASME Dynamic Systems and Control Conference, San Antonio, TX, October 22-24, 2014.
  115. P. Kallakuri and L.H. Keel, "A New Approach to Multivariable System Design for Controller Integrity," Proceedings of the 13th International Conference on Control, Automation, Robotics, and Vision, Marina Bay Sands, Singapore, December 10-12, 2014.
  116. S. Sathananthan, S. Fall, and L.H. Keel, "Control of Genetic Regulatory Networks with Partially Unknown Transition Probabilities," Proceedings of the 2015 American Control Conference, pp. 3126 – 3131, Chicago, IL, July 1-3, 2015.
  117. D.N. Mohsenizadeh, L.H. Keel, and S.P. Bhattacharyya, "Multivariable Controller Synthesis using SISO Design Methods," Proceedings of the 54th IEEE Conference on Decision and Control, pp. 2680 – 2685, Osaka, Japan, December 15-18, 2015.
  118. L.H. Keel and S.P. Bhattacharyya, "On the Stability of Multivariable Feedback Systems," Proceedings of the 54th IEEE Conference on Decision and Control, pp. 4627 – 4631, Osaka, Japan, December 15-18, 2015.
  119. E. Amullen, S. Shetty, and L.H. Keel, "Secured Formation Control for Multi-agent Systems under DOS Attacks," Proceedings of the 2016 IEEE International Symposium on Technologies for Homeland Security, Waltham, MA, May 10 – 12, 2016.
  120. E. Amullen, S. Shetty, and L.H. Keel, "Model-based Resilient Control for a Multi-agent System Against Denial of Service Attacks," Proceedings of the 2016 World Automation Congress, Puerto Rico, July 31 – August 4, 2016.
  121. L.H. Keel and S.P. Bhattacharyya, "Robustness and fragility of high order controllers: A tutorial," Proceedings of 2016 IEEE Multi-Conference on Systems and Control, Buenos Aires, pp. 191 – 202, Argentina, September 19 – 22, 2016.
  122. L.H. Keel and S.P. Bhattacharyya, "Exact multivariable control design using SISO methods: Recent Results," Proceedings of 2016 IEEE Multi-Conference on Systems and Control, Buenos Aires, pp. 215 – 223, Argentina, September 19 – 22, 2016.
  123. E. Amullen, H. Lin, Z. Kalbarcyzk, L.H. Keel, "Multi-agent system for detecting false data injection attacks against the power grid," Proceedings of the 2016 Annual Computer Security Application Conference, Los Angeles, CA, December 5 – 9, 2016.
  124. I.D. Diaz-Rodriguez, S. Han, L.H. Keel, and S.P. Bhattacharyya, "Advanced Tuning for Ziegler-Nichols Plant," Proceeding of the 20th IFAC World Congress, pp. 1841 – 1946, Toulouse, France, July 9 – 14, 2017.
  125. L.H. Keel, V.A. Oliveira, and S.P. Bhattacharyya, "A New Formula for the Characteristic Equation of a Matrix with Applications," Proceedings of 2017 IEEE Conference on Control Technology and Applications, pp. 1631 – 1636, Kohala Coast, HI, August 27 – 30, 2017.
  126. S. Han, L.H. Keel, and S.P. Bhattacharyya, "PID Controller Design with an H-infty Criterion," Proceedings of the IFAC Conference on Advances in PID Control, Ghent, Belgium, May 9-11, 2018.
  127. E.M. Amullen and L.H. Keel, "Consensus-Based Intrusion Detection for the Electric Power Grid Control System," Proceedings of 2018 World Automation Congress, Stevenson, WA, June 3-6, 2018.
  128. M.A. Rahman, L. Hong, and L.H. Keel, "Network Resource Management for Cloud based Networked Control Systems via Adaptive Sampling, Proceedings of 2018 American Control Conference, pp. 4165-4170, Milwaukee, WI, June 27-29, 2018.

 AWARDS/FELLOWSHIPS/SCHOLARSHIPS/SERVICES

SHORT COURSES, WORKSHOPS, AND INVITED LECTURES GIVEN:

  • One day Tutorial Workshop given at 1990 IEEE Conference on Decision and Control, December 1990, Hawaii (title: “Robust Control”).
  • Organizer and invited speaker for The International Workshop on Robust Control held in March 1991 and supported by the National Science Foundation and the Air Force Office of Scientific Research.
  • Lecture given for Guidance and Control Branch of NASA Goddard Space Flight Center, Greenbelt, MD. in April 1991 (title: “Robust Parametric Control”).
  • Lecture given for Spacecraft Dynamics Division of NASA Langley Research Center, Hampton, VA. in July 1991 (title: “Robust Parametric Control”).
  • Two day Tutorial Workshop on Robust Control given at 1992 AIAA Guidance, Navigation, and Control Conference, August 1992, Hilton-Hill, SC (Robust Control: “H1, LQG/LTR, and Parametric Approach”).
  • Lecture given for Guidance and Control Branch of NASA Goddard Space Flight Center, Greenbelt, MD., September 1993 (title: “Robust Parametric Control Toolbox”).
  • Three day Tutorial Lecture for Distinguished Lecture Series, Seoul National University, Seoul, Korea, August 1994 (title: “Robust Control: The Parametric Approach”).
  • Two day Tutorial Workshop given at 1994 Latin American Control Conference, Rio, Brazil, September 1994 (title: “Robust Control”).
  • Distinguished Lecturer of Chungbuk National University, Chengju, Korea, July 1995 (title: “Past and Future of Robust Parametric Control”).
  • One day Tutorial Workshop on Robust Control given at 1996 IEEE Conference on Decision and Control, December 1996, Kobe, Japan (title: “Robust Parametric Control with Applications”).
  • One day Tutorial Workshop given at 1999 American Control Conference, June 2 - 4, 1999, San Diego, CA (title: “A New Approach to Feedback Design: Robust & Optimal Classical Control”)
  • Two day Tutorial Workshop given at the Chungbuk National University, Chengju, Korea, July 12 - 13, 1999 (title: “New Approaches to Feedback Design”)
  • Two day Tutorial Workshop given at the 17th IFAC World Congress, July 4-5, 2008, Seoul, Korea (title: “Recent Advances in Three Term Control”)
  • One day Tutorial Workshop will be given at the 19th IFAC World Congress, August 24, 2014, Cape Town, South Africa (title: “Linear Systems – A Measurement Based Approach”)

OTHER PROFESSIONAL ACTIVITIES:

 

  • Reviewer, Numerous journals and conferences.
  • Reviewer, Academic Press, Prentice-Hall Publishing Co., McGraw-Hill Publishing Co.
  • Reviewer, National Science Foundation, NASA, Air Force Office of Scientific Research, Canadian Science Foundation, Qatar National Research Fund.
  • Evaluator, Served as an external evaluator of tenure & promotion committee for a number of universities including Purdue, Northeastern, Utah, etc.
  • Served on 1992 NASA review board for selecting University Centers of Excellence.
  • Organized International Workshop on Robust Control held in San Antonio, Texas in March 1991 and supported by the National Science Foundation, the Air Force Office of Scientific Research, Texas A&M University and Tennessee State University.
  • Served on the Panel for Evaluation of Engineering and Science Research Centers in Korea. (selected by Ministry of Science and Technology, Government of Korea)
  • Served on the SBIR Proposal Review Panels, National Science Foundation.
  • External Reviewer of Ph.D. Thesis, Department of Electrical Engineering, University of New Brunswick, Fredericton, NB, Canada, Oct. 1997. (Ph.D. Thesis: “A Geometric Alignment Approach to Parameter Estimation Based Fault Diagnosis” by Jovad Poshtan)
  • External Reviewer for Summer Research Fellowships and Research Grants, University of Toledo, Toledo, OH (Proposal: “Performance Analysis of Mobile Satellite System using Importance Sampling” by J. Kim)
  • External Reviewer of Ph.D. Thesis, Department of Electrical Engineering, Indian Institute of Technology, Bombay, India Oct. 1998. (Ph.D. Thesis: “On Interval Mathematics in Robust Control” by Gautam Sardar)
  • Program Committee, American Control Conference, 2000, 2001, 2002, 2004, 2006.
  • Registration Chair, 2003 American Control Conference, Denver, CO, June 2003.
  • Publication Chair, 2005 American Control Conference, Portland, OR, June 2005.
  • Registration Chair, 2010 American Control Conference, Baltimore, MD., June 2010.
  • International Program Committee, IFAC Conference on Advances in PID Control, Brescia, Italy, March 28 - 30, 2012.
  • Publication Chair, 2015 American Control Conference, Chicago, IL, June 2015.
  • News Editor, American Automatic Control Council, 2013 - 2016.
  • Member, International Program Committee, 3rd IFAC Conference on Advances in PID Control, Ghent, Belgium, May 9-11, 2018.
  • Program Co-Chair, 12th International Symposium on Intelligent Automation and Control, World Automation Congress 2018, Stevenson, WA, June 3-6, 2018.
  • Associate Editor, IEEE Control System Society Conference Editorial Board, 1995 – present.

SOCIETY MEMBERSHIPS:
Senior Member, IEEE Control Systems Society Senior Member, AIAA
Chairman, IEEE Computer Society Nashville Chapter, 1987-1990.

AWARDS AND HONORS:
Full Academic Scholarship, Gold-Star Yonam Foundation, 1971-1972, 1976-78. Eta Kappa Nu.
Phi Kappa Phi. Distinguished Researcher Award, Tennessee State University, 1996.





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